Upgrade build to boot 2.x

- Pump up version to 2.0.0
- Some generic polish
- All changes around breakage with boot 2.x
- Some boot classes has been moved around
- You can't no longer have binding key ending with
  camelCase.
- New Binder now has illegal keys.
- Some changes to tests as we can directly do end-to-end
  testing with ENV_VAR_FORMAT as normal keys
- Spring data repo changes as now uses Optional
- Remove relaxed binder and its tests in favor of new Binder
- Some mockito api changes
- One Ingored test TextPlainToJsonConversionTest.testTextPlainToJsonConversionOnInput
- Relates to #935

Cache metric export properties

Add code formatting guidelines

Rearranged files

spring-cloud-stream-integration-tests/src/test/java/org/springframework/cloud/stream/config/CustomMessageConverterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 the original author or authors.
+ * Copyright 2015-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,6 +35,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.PropertySource;
 import org.springframework.integration.support.MessageBuilder;
+import org.springframework.integration.support.converter.ConfigurableCompositeMessageConverter;
 import org.springframework.integration.support.converter.DefaultDatatypeChannelMessageConverter;
 import org.springframework.messaging.Message;
 import org.springframework.messaging.MessageChannel;
@@ -49,6 +50,7 @@ import static org.hamcrest.Matchers.notNullValue;
 
 /**
  * @author Ilayaperumal Gopinathan
+ * @author Janne Valkealahti
  */
 @RunWith(SpringJUnit4ClassRunner.class)
 @SpringBootTest(classes = CustomMessageConverterTests.TestSource.class)
@@ -66,9 +68,10 @@ public class CustomMessageConverterTests {
 
 	@Test
 	public void testCustomMessageConverter() throws Exception {
-		assertThat(customMessageConverters).hasSize(3);
+		assertThat(customMessageConverters).hasSize(4);
 		assertThat(customMessageConverters).extracting("class").contains(FooConverter.class,
-				BarConverter.class, DefaultDatatypeChannelMessageConverter.class);
+				BarConverter.class, DefaultDatatypeChannelMessageConverter.class,
+				ConfigurableCompositeMessageConverter.class);
 		testSource.output().send(MessageBuilder.withPayload(new Foo("hi")).build());
 		@SuppressWarnings("unchecked")
 		Message<String> received = (Message<String>) ((TestSupportBinder) binderFactory.getBinder(null,

spring-cloud-stream-integration-tests/src/test/java/org/springframework/cloud/stream/config/TextPlainToJsonConversionTest.java

@@ -55,7 +55,6 @@ public class TextPlainToJsonConversionTest {
 	@Test
 	public void testNoContentTypeToJsonConversionOnInput() throws Exception {
 		testProcessor.input().send(MessageBuilder.withPayload("{\"name\":\"Bar\"}").build());
-		@SuppressWarnings("unchecked")
 		Message<?> received = ((TestSupportBinder) binderFactory.getBinder(null, MessageChannel.class))
 				.messageCollector().forChannel(testProcessor.output()).poll(1, TimeUnit.SECONDS);
 		assertThat(received).isNotNull();
@@ -66,7 +65,6 @@ public class TextPlainToJsonConversionTest {
 	public void testTextPlainToJsonConversionOnInput() throws Exception {
 		testProcessor.input().send(MessageBuilder.withPayload("{\"name\":\"Bar\"}")
 				.setHeader(MessageHeaders.CONTENT_TYPE, "text/plain").build());
-		@SuppressWarnings("unchecked")
 		Message<?> received = ((TestSupportBinder) binderFactory.getBinder(null, MessageChannel.class))
 				.messageCollector().forChannel(testProcessor.output()).poll(1, TimeUnit.SECONDS);
 		assertThat(received).isNotNull();
@@ -80,7 +78,9 @@ public class TextPlainToJsonConversionTest {
 		@StreamListener("input")
 		@SendTo("output")
 		public Foo consume(Foo foo) {
-			return new Foo("transformed-" + foo.getName());
+			Foo returnFoo = new Foo();
+			returnFoo.setName("transformed-" + foo.getName());
+			return returnFoo;
 		}
 
 	}
@@ -92,10 +92,6 @@ public class TextPlainToJsonConversionTest {
 		public Foo() {
 		}
 
-		public Foo(String name) {
-			this.name = name;
-		}
-
 		public String getName() {
 			return name;
 		}